I just bought one of these and saw this right before I purchased it. I am light gamer, so I hope this mouse holds up. Like others, I think the wheel should be made of metal, not plastic, but even that is not really needed. Most of my other mice do not have metal wheels, and I have never ever had one of them break! I got the mouse due to its size. It is among one of the most comfortable mice I have ever used for gaming. If it used AA batteries instead of a built in, non replaceable battery, it would be almost perfect. I got the mouse from Best Buy and bought their 2 year replacement plan on it, however, if this things breaks in the next month like others have, the way I use mice, I am returning it. This is a hardware problem that should be easy to fix. No firmware upgrade will fix it. The problem is also partially caused by the obsession to make these things lighter and lighter, which I do not understand. It is a MOUSE, not an anvil. ALL mice are lightweight! The way to making them lighter is to use thinner and more fragile pieces. Make these things better!!